NASA is developing spacecraft to replace its aging shuttle fleet and return astronauts to the Moon by 2020. The first spacecraft in the Constellation program is expected to be launched in 2015, five years after the scheduled end of the shuttle program. Related Article
LOS ANGELES, California (AP) -- A small NASA spacecraft embarks on a two-year mission this weekend to give scientists their first view of the happenings at the edge of the solar system.
NASA hopes its new Ibex probe will help explain why the sun's protective heliosphere is shrinking.
The Ibex probe, short for Interstellar Boundary Explorer, will study a chaotic region in space where the solar wind from the sun clashes with cold gases from interstellar space.
An orbiting spacecraft has sent back new evidence for the presence of water on Mars. Scientists long have debated whether water flowed on the red planet, with evidence increasing in recent years. The presence of water would raise the possibility of at least primitive life forms existing there.Images from a camera aboard NASA's Mars Reconnaissance
